You've done a brilliant job of missing the point. I take no issue with Davis using the themes. Of course he was asked to do so -- what kind of Jurassic Park movie wouldn't have the theme?

Davis's problem is that he waves the theme around in panic -- afraid that we'll all forget what we're watching. It's everywhere, unrelenting and terribly misused. Rather than use it to punctuate important scenes, he clocks us over the head with it, over and over again. I don't think we heard the theme that often even in the first movie.

When Williams composed the Lost World, he recognized that, being a different movie, it should have its own theme. This didn't stop the original from resurfacing here and there, but ONLY when needed. Davis has prevented the third score from developing its own identity (a problem shared by the movie itself), and reasserts the fact that the third installment is nothing more than a cash-in (even more so than the second one). Maybe he was acting on order from the director, but when a director botches a movie this badly, perhaps the composer should back out of the game before his music goes down with the ship.